South Allegheny School District is a suburban, public school district located in Allegheny County, Pennsylvania.

It serves the Pittsburgh suburbs of Port Vue, Liberty, Glassport, and Lincoln.

South Allegheny School District encompasses approximately 9 square miles.

According to 2000 federal census data, it serves a resident population of 13,109.

In 2009 the district residents' Per capita income was $16,590, while the median family income was $38,949.